簇孔式喷嘴对柴油机燃烧和整机性能的影响

Effect of group-hole nozzle to diesel combustion and engine performance

燃油的喷射、雾化和蒸发及其与空气的混合直接影响着柴油机的燃烧和排放,同时也对柴油机整机性能表现具有关键作用。根据簇孔式喷油嘴的概念及其喷雾特性,簇孔式喷嘴在喷雾贯穿距离、喷雾锥角、雾化能力等喷雾特性上的独特优势,分析了簇孔喷嘴对柴油机点火延迟的影响;在整机性能方面,簇孔喷嘴对柴油机燃油经济性、燃烧噪声、氮氧化物排放等的影响。该研究结果对高性能柴油机喷嘴设计具有一定参考价值。

Diesel combustion and emission are directly influenced by the fuel injection, atomization and mixing with air, which also influences the engine performance. Bassed on the conception and spray characteristics of a group-hole nozzle, including spray penetration, spray cone angle and atomization, the effect of a group-hole on the ignition delay, the effect of a group-hole on fuel economy, combustion noise and nitrogen oxides emission were high-lighted and analized. The research results are valuable for the design of the high-performance nozzle.